Originally Posted by
immunedata
It might be implied when you say 'main bus area' but there is a separate bus area for Business pax which is the same spot the BMW picks you up from so I wouldn't have expected the segregation over at C5.
There is segregation at the C gates. Economy gets dropped off near C11 and picked up near C5. Business is dropped off and picked up near the old aero train station (just below the satellite golden lounge).
There is no segregation for getting to the main concourse. Both are dropped off just below the regional golden lounge (gate H2) because that's the closest to baggage claim/immigration or transfer to the GH gates above.
Pick up from main building is at G1 for premium cabins and close to the old aero train station at the main concourse for economy.